"You know what? That’s way more interesting than answering some stupid questions. I would have carried on, but Collective Unconscious is acting insane lately. Even by its standards. Just like the end of the world or some other thing of universal importance. I think I should I find out myself in the nearest future."~Discord

Isn't this before discord get's out and wrecks equestria for the first time? By that I mean when Luna and Celestia stopped him. If so, Fluttershy hasn't been born yet there for either he can predict the future or there's another pony out there that resembles Fluttershy in every way... that or I'm nitpicking for no reason.

So either there's a wild guess involved, a plothole (lol), or that principal is so chaotic that even time and events is irrelevant to him, because I think this tale is supposed to be "back in the day" of Discord, meaning minimum a thousand years back... So how come Fluttershy was mentioned?